The purpose of this clinical study is to evaluate the effects of TA-65 MD® on telomere length and on immunosenescence in subjects who have had 9 months of twice daily TA-65 MD® administration, compared to placebo. TA Sciences has developed different doses of TA-65® . The study intends to determine effect of four different doses of TA-65 MD® in terms of biomarkers, telomere length and overall health and sleep status.